function P=VI_step_player(G,P,k)
ax=axis;
cx=(ax(1)+ax(2))/2;
cy=(ax(3)+ax(4))/2;
[x,y,b]=ginput(1);
if b>1,
    no_full_screen;
    P.is_gameover=1;
elseif b==1,
    xd=x-cx;
    yd=y-cy;
    ax(1:2)=ax(1:2)+xd;
    ax(3:4)=ax(3:4)+yd;
    axis(ax);
end;
